Tartiflette (French pronunciation: ​[taʁtiˈflɛt]) is a French dish from the Savoie and Haute Savoie region of France. It is made with potatoes, reblochon cheese, lardons and onions.The word tartiflette is probably derived from the Arpitan word for potato, tartiflâ."This modern recipe was inspired by a truly traditional dish called "péla": a gratin of potatoes and onions (without cheese) in a long-handled pan called a pelagic (shovel) in the Provence region of France.